Stopboundinf {BayesianPlatformDesignTimeTrend} | R Documentation |
This function summaries and checks stopping boundary information.
Stopboundinf(
Stop.type = "Early-Pocock",
Boundary.type = "Symmetric",
cutoff = c(0.9928, 0.0072)
)
Stop.type |
The type of stopping boundary should be "Early-Pocock", "Early-OBF" and "Noearly". Default is "Early-Pocock" which is the Pocock boundary with early stopping. |
Boundary.type |
Whether the futility boundary and the efficacy boundary are the same conservative. Default is "Symmetric" which means they are as conservative as each other. Boundary.type = "Asymmetric" means that the efficacy boundary and the futility boundary are not as conservative as each other |
cutoff |
= c(cutoff1, cutoff2). A numerical vector of cutoff value for each boundary. The first element is the efficacy boundary cutoff. The second element is the futility boundary cutoff Pr(theta_1 > theta_0|D_n) > cutoff1. Should input the cutoff1 for efficacy boundary as the first element Pr(theta_1 < theta_0|D_n) < cutoff2. Should input the cutoff2 for futility boundary as the first element |
The list of information required for boundary construction function 'Stopbound.inf'
Ziyan Wang
Stop.type = "Early-Pocock" #(Pocock boundarty is a flat boundary across time)
Boundary.type = "Symmetric"
cutoff = c(0.9928, 0.0072)
Stopbound.inf = Stopboundinf(Stop.type, Boundary.type, cutoff)
#Stopbound.inf
#$Stop.type
# [1] "Early-Pocock"
#$Boundary.type
#[1] "Symmetric"
#$cutoff
# [1] 0.9928 0.0072